A friend of mine has a 1991 Fiesta and the dash illumination lights quit working. I checked the fuses and made sure the dash light intensity switch was turned up. Are there any common problems I should look for? Also is the wiring diagram available online or possibly in Haynes?

 

Wiring diagrams are always around - likely pricey for anything good. Maybe check fuses first, then check bulbs and last try new switch.